JP3505027B2 - Defective device - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to the detection and defective product removing device for removing the rice grains or foreign matters defective foreign matter mixed in rice grains acceptability or rice grains group as inspection object rice grain group.

[0002]

2. Description of the Related Art In the above defect removal apparatus , for example, while illuminating a rice grain group transported along a predetermined route from the lateral direction of the route, the illumination light is reflected by transmitted light transmitted through the rice grain group or rice grain groups. When either one of the reflected lights is received by a light receiving means such as a photo sensor, and the light receiving level is within a preset setting proper range, it is determined as a normal rice grain, and when it is out of the setting proper range, It is determined that there are defects such as the coloration of rice grains and the inclusion of foreign substances such as stones and plastics.

[0003]

However, in the above-mentioned prior art, the defect of the rice grain or the mixture of foreign matter is discriminated by using only the light reception information of either the transmitted light or the reflected light from the inspection object. Therefore, for example, a defect or the like that can detect only one of the transmitted light and the reflected light may not be detected when only the light reception information of the other is used. In other words, for colored glass with a light transmittance similar to rice grains, it may be detected with reflected light but not with transmitted light, and conversely, white stone or plastic with a light reflectance similar to rice grains may be detected. In some cases, transmitted light can be detected, but reflected light cannot.

The present invention has been made in view of the above circumstances, and an object thereof is to eliminate defects in rice grains based on light reception information of both transmitted light and reflected light in order to solve the problems of the above-mentioned prior art. It is possible to accurately detect the mixing of foreign matters and, based on the detection result, reliably separate and remove defective rice and foreign matters from normal rice grains.

[0005]

According to the constitution of claim 1, defective rice grains or foreign substances are removed by detecting the quality of rice grains or foreign substances mixed in the rice grain groups by using the rice grain groups as an inspection object. Will be. That is, when the rice grain group as the inspection object transferred along the planned transfer path is transferred to the light receiving target portion for the planned transfer path of the transmitted light receiving means,
Illumination light from one side across the planned transfer path is transmitted through the inspection object (rice grain group) and is received on the other side across the planned transfer path, and the above-mentioned rice grain group is scheduled to be transferred to the reflected light receiving means. When the light is transferred to the light receiving target part for the route, the illumination light from one side across the planned transfer route is reflected by the inspection target (rice grain group) and is received on the same side across the planned transfer route. Defective rice grains and foreign substances, which are determined based on the light reception information at the light receiving target portion of the light receiving means, are separated and transferred to a route different from the normal rice grain route of the inspection target (rice grain group). Therefore, for example, in order to detect the defect and remove the defect without transferring the inspection target (rice grain group), it is necessary to configure the device side so that the inspection target (rice grain group) can be moved. ) Is sequentially transferred from the light receiving target position of each light receiving means, that is, the defect detection position to the separation position on a different path, that is, the defective product removal position, while the defective rice grains and foreign substances are separated from the normal rice grains and transferred. As a result, it is possible to obtain a defective product removing device in which the respective parts of the device are rationally arranged and smooth operation can be realized while keeping the device side immovable. Further, since the illuminating means is composed of a single illuminating means, the device configuration can be simplified as compared with the case where the illuminating means for transmitted light and the illuminating means for reflected light are separately provided. it can. Then, the illumination light for illuminating the rice grain group as the inspection object is transmitted through the rice grain group and received by the transmitted light receiving means, and is reflected by the rice grain group and received by the reflected light receiving means. Based on the received light information, the quality of the rice grain or the presence or absence of foreign matter mixed in the rice grain group is determined. At that time, when the amount of light received by each of the light receiving units in the transmitted light receiving unit is out of the proper setting range, and when the amount of light received by each of the light receiving units in the reflected light receiving unit is outside the proper setting range, The presence of defects or foreign matter is determined. To add the explanation, the inspection object (rice grain group) being transferred in a single state along the planned transfer route in a state of being aligned in a plurality of rows is illuminated along the entire width in the direction of arrangement, and along the direction of arrangement. The light is received by a plurality of light receiving units juxtaposed over the entire width, and based on the light receiving information of the plurality of light receiving units, the quality of the rice grains in the entire width in the alignment direction of the inspection objects (rice grain groups) in a plurality of rows or Since the presence / absence of mixed foreign matter is determined, compared to, for example, a case where the inspection object (rice grain group) is transferred in a single row state rather than in a row of multiple rows, the entire width in the row direction is parallel, that is, defects are efficiently detected. Can be detected. Therefore, since the quality of the rice grain or the foreign matter is detected based on both the received light information of the transmitted light transmitted through the rice grain group and the reflected light reflected by the rice grain group, the received light information of either the transmitted light or the reflected light as in the conventional case. As in the case of detecting the quality of rice grains or foreign matter based on the above, there is a problem that a defect that can be detected only in one of transmitted light and reflected light cannot be detected when only the received light information of the other is used. Therefore, it is possible to accurately detect defective rice grains and foreign substances, and for defective rice such as colored rice and barrel cracks and foreign substances that do not transmit light such as stones and plastics, the amount of light transmitted through normal rice grains Can also be detected by reducing the amount of light (that is, falling below the proper setting range for transmitted light), and when strong reflected light is received due to light reflection from part of it, such as a piece of glass, the amount of reflected light It can be accurately detected for various defects as can be detected by outside above the set appropriate range of the reflected light. In addition, both of the light receiving means are provided with a plurality of light receiving portions capable of taking out light receiving information separately for each light receiving target range having a size smaller than the size of the rice grain over the entire range of existence of the inspection target. Therefore, based on the light receiving information of the plurality of light receiving portions of each light receiving means, it is possible to determine the defect of the rice grain or the presence of the foreign matter when the light receiving amount of each light receiving portion is out of the set proper range. Of.

[0006]

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

According to the second aspect, wherein in the section 1, will rice grain group to be transferred along the transfer path, it will transfer path direction transmitted light receiving unit and the reflected light receiving set at substantially the same position in When the defective rice grain or the presence of foreign matter is determined on the basis of the light reception information of both light receiving means in the planned transfer route of the means, the defective rice grain in the planned transfer route from the light receiving target point or The defective rice grain or the foreign substance is separated into a route different from the normal rice grain route as the transfer time to the separation point for the foreign substance to the different route elapses.

Therefore, for example, when the light receiving target portions of the respective light receiving means with respect to the planned transfer route are set at different positions in the planned transfer route direction, defective products are detected based on the light receiving information at the respective light receiving target positions of the respective light receiving means. When it is detected, since the transfer time from each light receiving target location to the defective material separating location is different, it is necessary to control the timing separately. Since only a single timing control up to a point is required, the control configuration can be simplified, and the preferred means of the defective article removing apparatus according to claim 1 can be obtained.

[0015]

[0016]

According to the configuration of claim 3 , claim 1 or 2
In the above, air is blown to the defective rice grains or foreign matters in the rice grain group being dropped and transported by its own weight, and the defective rice grains or foreign matters are separated from the normal rice grain transportation route.

Therefore, since the defective rice grains or foreign substances are separated from the normal rice grain transfer path by the air blowing action, for example, they are directly contacted by a mechanical means such as a plate that moves in and out. Compared with the case of separation, the separation can be performed favorably with a high response speed and without damaging the soft touch, so that the preferred means of the defective article removing device according to claim 1 or 2 can be obtained.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a defect detecting device and a defect removing device according to the present invention will be described while detecting a defect while transferring a rice grain group such as brown rice or polished rice along a predetermined route as an inspection object. The case of removing objects will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a plate-shaped shooter 1 having a predetermined width is attached to a horizontal plane at a predetermined angle (for example, 45).
The rice grain group k supplied by the hopper 7 or the like from the upper side of the shooter 1 is slid and transferred in a laterally spread state in a single state. Below the shooter 1, a good rice collection box 2 for collecting normal rice grains k in the rice grain group k that naturally falls from the lower end of the shooter at a predetermined speed, and colored rice (burnt rice) separated from the flow of normal rice grains k. ) And broken rice, etc., and a defective product collection box 3 for collecting foreign matter such as stones or glass fragments. From the above, the shooter 1 is in a state in which the rice grains k are arranged in a single layer and in a plurality of rows along the planned transfer route (that is, the flow route of the rice grains k on the shooter and the dropping route of the rice grains k jumping out from the lower end of the shooter). A transfer means H for transferring is configured.

A fluorescent lamp or the like is provided so as to illuminate the entire width of the rice grain groups k of a plurality of rows in one row on one side of the planned transportation route, that is, the dropping route of the rice grain groups k from the lower end of the shooter. The line-shaped light source 4 and the line sensor 5B that receives the reflected light of the illumination light from the line-shaped light source 4 reflected by the rice grain group k are provided, and the illumination light from the line-shaped light source 4 is provided on the other side. A line sensor 5A that receives the transmitted light that has passed through the group k is provided. A line sensor 5 for reflected light upon receiving illumination light from the linear light source 4
A reflecting plate 8 for reflecting toward B is provided, and the reflecting plate 8 has a length corresponding to the entire width of the rice grain group k illuminated by the linear light source 4 in the region 8a having the same reflectance as rice grains. The black regions 8b are formed on both sides thereof.

As described above, the illuminating means for illuminating the rice grain group k is constituted by the single illuminating means, that is, the line-shaped light source 4, and the illumination light from the line-shaped light source 4 passes through the rice grain group k and then the transmitted light. The irradiation direction of the illuminating light is such that the illuminating light from the linear light source 4 is incident on the line sensor 5A as the light receiving means and is reflected by the rice grain group k and then enters the line sensor 5B as the reflected light receiving means. It is set.

Further, as shown in FIG. 2, the light receiving target portion J of both the line sensors 5A and 5B with respect to the planned transfer route is set at substantially the same position in the route direction of the planned transfer route, and both line sensors are arranged. 5A and 5B are configured such that the entire width of the rice grain group k in the plurality of rows is the detection target range along the arrangement direction. Then, the transfer means H is configured to transfer the rice grain group k to the light receiving target portion J of the line sensors 5A and 5B with respect to the planned transfer path.

As shown in FIG. 4, both line sensors 5 are
A and 5B are provided with a plurality of light receiving portions 5a capable of taking out light receiving information for each light receiving target range with a range p smaller than the size of the rice grain k (for example, about 1/10 of the size of the rice grain k). , The entire rice grain group k is provided. Specifically, a monochrome type CCD sensor in which light-receiving elements as a plurality of light-receiving units 5a are juxtaposed linearly over the entire width along the arrangement direction of the rice grain groups k in the plurality of rows, and the rice grain groups k And an optical system for forming an image on the respective light receiving elements of the CCD sensor. Thereby, transmission and reflection image information in the entire width of the rice grain group k in the flow direction can be obtained.

From the light receiving target portion J in the planned transfer route of both the line sensors 5A and 5B to the lower side in the route,
An air blowing device 6 is provided for blowing air to the rice grains k and foreign substances that have been determined to be defective to separate them from the normal flow direction of the rice grains k and to collect them in the defective product collection box 3. This air spraying device 6 uses rice grains k
It is provided with a plurality of air guns 6a that are individually sprayed to each rice grain group k divided into a predetermined width in the lateral direction with respect to the flow direction of.

The control configuration will be described. As shown in FIG. 3, a control device 10 utilizing a microcomputer is provided, and the control device 10 is provided with both the line sensors 5A and 5A.
Each image signal from B is input, and from the control device 10,
In order to individually operate each air gun 6a of the air blowing device 6, a drive signal is output to a plurality of solenoid valves 11 for turning on / off the air circulation of each air supply path from the compressor (not shown) to each air gun 6a. ing.

Using the control device 10, a discriminating unit 100 for discriminating the quality of the rice grain or the presence or absence of the foreign matter is configured based on the light reception information of the line sensors 5A and 5B. If the received light amount of each light receiving portion 5a of the line sensor 5A for transmitting light out of the set appropriate range, and, the line sensor 5B for reflecting light
In the case where the amount of light received by each of the light receiving portions 5a is out of the appropriate setting range, it is configured to determine whether the rice grain is defective or the foreign matter is present. Specifically, the line sensor 5A for transmitted light in FIG. 5 and the line sensor 5 for reflected light in FIG.
As shown in each output waveform of B, each line sensor 5A, 5
Based on the light receiving information of each of the plurality of light receiving portions 5a, when the output voltage corresponding to the light receiving amount of each light receiving portion 5a deviates from the set proper range ΔEt, ΔEh, the defect of the rice grain or the presence of the foreign matter To judge. Here, in the case of transmitted light,
Since the output voltage level e0 when the standard transmitted light from the normal rice grain is received is larger at the position where the rice grain k does not exist, the setting proper range ΔEt for the transmitted light is a predetermined amount below the voltage level e0. Is set as a range equal to or higher than the set level ek on the side, and the proper setting range ΔEh for reflected light is
The output voltage level e0 ′ for the standard reflected light from normal rice grains is set in the range of a predetermined upper and lower width.

In FIG. 5 and FIG. 6, the above setting is made at the position where the rice grain k has a partly colored portion (shown by e1 and e1 ') and the position where there is a cracked portion (shown as e2 and e2'). An example is shown in which the proper range ΔEt, ΔEh is deviated to the lower side, and when a foreign substance such as a glass piece is present, a strong direct reflected light from the foreign substance causes the setting proper range ΔEh as shown at the position e3 ′. It illustrates the state of being deviated to the upper side from. Further, although not shown, in a black stone or the like, both reflectance and transmittance are extremely small, and therefore both waveforms deviate greatly from the appropriate setting ranges ΔEt and ΔEh to the lower side.

Then, the transfer means H also utilizes the control device 10 and the air blowing device 6, and based on the discrimination information of the discrimination means 100, normal rice grains in the rice grain group k and defective ones. The rice grains and the foreign matter are separated and transferred to different routes. Specifically, when the determination unit 100 determines that the rice grain is defective or the foreign matter is present, the both line sensors 5
Separation points from the light receiving target portion J of A and 5B to the planned transfer path to a different path for the defective rice grain or the foreign matter in the planned transfer path (the air gun 6).
The defective rice grain or the foreign matter is separated into a route different from the normal rice grain route as the transfer time to the location (a) is increased. That is, the rice grain group k is dropped and transferred by its own weight, and the defective rice grains or foreign matter is separated from the normal rice grain path by blowing air from each air gun 6a corresponding to the position.

[Another Embodiment] A light receiving target portion J with respect to the planned transfer paths of both light receiving means (line sensors 5A, 5B).
Is not limited to being set at substantially the same position in the route direction of the planned transfer route as in the above embodiment. As shown in FIG. 7, the light receiving target portion J1 is set for the planned transfer route of the reflected light receiving means (line sensor 5B), and the transmitted light receiving means (line sensor 5A) is provided on the lower side in the route direction than this position. You may make it set the light-receiving target part J2 with respect to a planned transfer route. Therefore, in this case, if the defect is first determined based on the received light information of the reflected light, and the defective product is transferred and the defect is determined based on the received light information of the transmitted light, the defective product is blown into the air. When transferred to a location, the timing is controlled so that they are transferred separately.

In the above embodiment, when the discriminating means 100 has both the received light amount of the transmitted light receiving means (line sensor 5A) and the received light amount of the reflected light receiving means (line sensor 5B) outside the proper setting range, Although it is configured to determine whether the rice grain is defective or the presence of the foreign substance is present, the defective rice grain or the presence of the foreign substance is determined when the amount of light received by one of the light receiving units is out of the appropriate setting range. You can also do it.

In the above embodiment, the illuminating means 4 is constituted by a linear fluorescent lamp so as to illuminate the whole width of the inspection object (rice grain group k) in a plurality of rows. )
The specific configuration of the illuminating means can be appropriately changed according to the existence range and other conditions.

[0033]

In the above embodiment, each light receiving means 5A, 5B
Although it is configured by using a monochrome type CCD sensor, it may be configured by using an image pickup tube type television camera. Also, it is not a monochrome type but a color type CC
A D sensor may be used to more accurately determine the presence or absence of defective rice or foreign matter based on the amount of light received for each of the color information R, G, and B.

[0035]

In the above embodiment, the inspection object (rice grain group k)
In order to configure the transfer means H for transferring a plurality of sheets in a state of being lined up in a single line along the planned transfer path, an inclined shooter 1 is provided and an inspection object (rice grain group k) is slid on the surface thereof. However, in addition to this, for example, a transporting device or the like may be provided to load and transport the inspection target (rice grain group k) in a single layer. Further, the transfer means H is configured so that air is blown toward the defective rice grains or the like in the rice grain group k that is falling by its own weight to separate and transport the defective rice grains or foreign substances from the normal rice grain path. However, the present invention is not limited to this, and for example, defective rice grains may be sucked by air.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a defect detection / removal device.

FIG. 2 is a schematic side view of the same.

FIG. 3 is a block diagram of a control configuration.

FIG. 4 is an explanatory diagram of a light reception detection range.

FIG. 5 is an output waveform diagram of transmitted light receiving means.

FIG. 6 is an output waveform diagram of reflected light receiving means.

FIG. 7 is a schematic side view of a defect detection / removal device according to another embodiment.

[Explanation of symbols]

4 Lighting means 5A Transmitted light receiving means 5B Reflected light receiving means 100 discriminating means H transfer means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazushige Ikeda               64, Ishizukitamachi, Sakai City, Osaka Prefecture               Bota Sakai Factory (72) Inventor Yuichi Yamazaki               64, Ishizukitamachi, Sakai City, Osaka Prefecture               Bota Sakai Factory (72) Inventor Tomoko Nakao               64, Ishizukitamachi, Sakai City, Osaka Prefecture               Bota Sakai Factory (72) Inventor Shinichi Kitano               64, Ishizukitamachi, Sakai City, Osaka Prefecture               Bota Sakai Factory                (56) References JP-A-61-114786 (JP, A)                 Japanese Patent Laid-Open No. 64-66550 (JP, A)                 JP-A-7-96253 (JP, A)                 JP-A-58-159882 (JP, A)

Claims (3)

(57) [Claims] 1. A defective object removing device for removing defective rice particles or foreign substances by detecting the quality of rice grains or foreign substances mixed in the rice grain group by using the rice grain group as an inspection object, and illuminating the inspection object. Illuminating means (4), illuminating light from the illuminating means (4), transmitted light receiving means (5A) for receiving transmitted light transmitted through the inspection object, and the illuminating means (4).
Reflected light receiving means (5B) for receiving the reflected light of the illumination light from the object to be inspected, and the both light receiving means (5A),
A discriminating means (100) for discriminating the quality of the rice grain or the presence or absence of the foreign matter based on the received light information of (5B), and a transfer means (H) for transferring the inspection object along a planned transfer path.
And the illuminating means (4) is composed of a single illuminating means (4), the illumination light from the single illuminating means (4) is transmitted through the inspection object, and then the transmitted light is transmitted. Irradiation direction of the illuminating light so that the illuminating light from the single illuminating means (4) is incident on the light receiving means (5A) and then is reflected by the inspection object and then enters the reflected light receiving means (5B). The light receiving means (5A) and (5B) each have a plurality of light receiving portions (5a) capable of taking out light receiving information separately for each light receiving target range which is smaller than the size of the rice grain. The discrimination means (100) is configured to be provided over the entire range of existence of the inspection object in a state of being juxtaposed linearly over the entire width along the arrangement direction of the inspection objects of the plurality of rows. The transmitted light receiving means (5
When the amount of light received by each of the light receiving portions (5a ) in A) is out of the proper setting range, and the reflected light receiving means (5B)
When the amount of light received by each of the light receiving units (5a) is out of the appropriate setting range, the defective rice grain or the presence of the foreign matter is determined, and the illumination is provided on one side across the planned transfer route. A means (4) and the reflected light receiving means (5B) are arranged, the transmitted light receiving means (5A) is arranged on the other side, and the transfer means (H) holds the inspection object in a single layer and The transfer means is configured to be transferred in a plurality of rows, and the inspection object is transferred to the light receiving target locations of the both light receiving means (5A) and (5B) with respect to the planned transfer path, and the determination means (100) determines. Based on the information, the normal rice grains, the defective rice grains, and the foreign matter of the inspection object are configured to be separated and transferred to different paths, and the illumination unit (4) is configured to inspect the plurality of rows. In the alignment direction of the objects It is configured to illuminate the width, and both of the light receiving means (5A) and (5B) are configured to set the entire width as the detection target range along the arrangement direction of the inspection objects in the plurality of rows. Object removal device. 2. The light receiving target portions of the both light receiving means (5A) and (5B) with respect to the planned transfer path are set at substantially the same position in the path direction of the planned transfer path, and the transfer means (H) is When the defective rice grain or the presence of the foreign matter is discriminated by the discriminating means (100), from the light receiving target portion of the both light receiving means (5A), (5B) to the planned transfer path. The defective rice grain or the foreign substance is configured to be separated into a route different from the route of the normal rice grain as the transfer time to the separation point to the different route for the defective rice grain or the foreign substance elapses. The defective product removing device according to claim 1. 3. The transfer means (H) drops and transfers the inspection object by its own weight, and blows air onto the defective rice grain or the foreign substance to cause a path different from a normal rice grain path. The defective object removing device according to claim 1 or 2, which is configured to be separated into two.